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From: "Rego, P." <pvrego@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: Pop function
Date: Wed, 14 Dec 2011 17:23:44 -0800 (PST)
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Date: 2011-12-14T17:23:44-08:00
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> If Sender is null, your in trouble before you get to "begin".
> Also, is it really ok to return 0 from an empty list rather than raising an
> exception?
That's the point. Actually I need to return some enumerated like NONE, but 0 would fit as well. 

> What does Sender "point to" on return if the head of the list is removed?
I'd like to return the "next" in the list, or null (so "0" or some NONE), if the the next does not exist.